Friction device for doors, &amp;c.



C. T. ASHMAN.

m1011011 DEVICE Pon Imm. 5U'.

A1'PL1UA'11UN FILED DECK/11909.

Patented Aug. 25, 1914.

2 SHEETS SHEET 1.

C. T. ASHMAN. PRICTIUN DEVICE FUR DOORS, dw.

APPLICATION FILED DEUR/,15300, 1,108,663.

Patented Aug. 25, 1914.

` CHARLES ,T. Amm, .OF PHILADELPHIA, PENNSYLVNIA.

mc'rIoN DEVICE ron noone, aw.

Specification ot Letters Patent.

Patenten Aug. eri, 1914.

Application illed December 7, 1909. Serial Nia. 531,815. l

To all whom it may concern:

Be it known that I, CHARLES T. ASHMAN, a citizen of the United States, r'esidingin Philadelphia, Pennsylvania, have invented certain Improvements in Friction Devices for Doors, &c., of which the following 1s a specification.

The object of thiainvention is to provide a friction device which can be applied to doors, either as a separate device independentof'the hinges or to take the place. of the hinges, so that the door can be held in the position to ,which it is adjust-ed without the use of other vfastenings or stops.

The invention is particularly adapted for use on doors of vessels and railway cars, where the motion of the vessel or vehicle' causes the door to swing, and it may be used on doors of buildings aswell, where it is desired to h old them full open or partly closed.

In the accompanying drawings Figure 1,.'is a sectional plan view through a door and jamb, and illustrating my invention; Fig. 2, is a. Iside view of the fastening, the door and jamb being omitted; Fig. 3, is a sectional View oxrthe line 3-3, Fig. 1; Fig. 4. is a sectional plan view on the line 4 4, Fig. 3; Fig. 5, is a detached perspective view of the arms; Figr, is a detached perspective view of the washer; Fig. 7, a detached perspective view of the bolt; Fig. 8,

' is a detached perspective View of the sleeve;

Fig. 9, is :i view showing my invention designed as a hinge; and Figs. 10 and 1l, are

views illustrating| modifications of the in-A vention.

A is the door jamb in the present instance. l y

i is the door hinged at b to the door janib, the hinge shown being of the ordi nary type.

I) is the friction device, and, as illustrated in Figs. 1.and 2, this friction device has a central hub withprojecting arms, one arm being connected to the door and the. other ariii being yconnected to the door jamb. These arms' may be made in any form desired. In the present instance there is a single arm `C which is pivoted to a bracket c secunai to the door jamb A, and a pair of arms piyod to a bracket c secured t'o the doorJ-f Y.

F is a bolt having an enlarged head f provided with :i pin which entersan opening in one of the arms E, so that the bolt will move with the arm, and f2 is a washer made as shown in Fig. (i, having a flattened portion adapted to the fiat side of the holt l". A wing nut fz is adapted to the threaded portion of the bolt, so that the parts can he adjusted to any position desired.

Between the arm C and the arms E are friction. disks d of fiber, brass or other suitable material. lVhen the arms are iiiade of brass I preferably secure'on each side ol' the central ariii C disks c of iron or steel.

G is a sleeve, clearly shown in Fig. 8, having projections y] which enter notches c' in the `arms IC. as shown in Fig. so that. th sleeve will turn with the arms. 'l`hc sl eve is loosely mounted between the arms1 E, so as to allow. the nut f3 to he adjusted to anypositioii desired to increase or diniiiiish the friction.

In Fig. 1i, l have shown my invention as applied to :i hinge, the arm lE beingl connected io the plate EL' and the arni C beim;r nonni-i ted to the plate (J2, and the arm ICT is notched io engage the plate E, so that the parts can be adjusted.

Iii-Fig. 10, I have shown a modification ot the friction iiicchanisiii. ln this case tho arm E3 is in the forni of a socket to receive the friction disk d andthe arm C is also in the form of a socket to receive the friction disk the two disks beingr held to their parts hy pins or other suitable devices. The boliJ li" is connected 'to the washer F* in the present instance hy a plate ff' which enters a perforation inthe washer-.and a groove inthe holt. so as to prevent the holt and washer turning independently.; thf.` .same wing nut is used as in the main figures.

In Fig. 11 is shown a modification in which thc armsare provided with friction surfaces which contact', during a part only of thc pivotal iiioveinciit.- The object of this constructioi'i to allow the door to swing freely to the open or closed position, and when it is desired to hold it open,'it is iiiovcd hack to its full extent; whereupon the friction surfaces come into action and hold the door rigidly. In the present instance this arrangement consists of a central 'arm C4 having friction disk sockets formed by annular flanges fl. (l which are of varying heights and project on opposite faces thereof. Each of the side'arins C* also has an annular flange d of var fing height which forms a socket fon one o the friction disks d. The unges of ad'acent arms are-so arranged that the ywill engage each other during e part on y ofv the pivotal movement of the arms and will remainout of contact during the remainder of such movement.

By disposing the flanges in different positions relative to their respective arms, these may he used to retard the free movement of o door at :my angle desired. F orv example, the flanges may be so placed as to engage each other when the door is nearly full open or closed, the wing nut f being adjusted on the holt F to vary the frictional pressure between the several paris. By hacking oil this wing nut the arms are left --f ree to move into any position.

It will be seen thatl construct a device appliceble either ns a hinge or as a se arnte friction device independent of the inge. The hinge cnnbe used upon new work and the friction device can be used on old work without. disturbing the ordinary hinge of tbe door. any nmonnt of friction can be applied as desircd, or can be s0 adjusted as to entirely dispense with thc friction.

L1 Figs. i :and 2, I have shown the pivots n :ind m for the arms C and E i'n the form of bolts provided with wing nutsl 'n' and m', respectively, so that, ify it is desired, friction een be applied :it these pivot points as well as the main pivot point of the device.

'While I have described my invention ns including three arms, two attached to the,

v door-jnmb and one attached to the door, it

is obvious that l may employ but two arms, pne connected to the door-jamb and one oonneeted to the door, asis shown for example in thevhinge construction ofFig. 10.

l claim l. lhe combination in a friction device el n plurality of -arms pivotally connected ton gethcr and ha vin inclined friction surfaces; with friction dis is interposed betweeny the arms in position to exert friction thereon during :i portion of their possible movement,

the ini-lined friction surfaces of tbe arms be-4 ing placed to'come, into engagement only nfter said arms have turned through a predetermined nn nie.

2. The combinntion in n friction device of 4two arms pivolally secured together and each having n flange of varying depth; with n friction risk interposed between the arms, said flanges beinglr placed to engage euch other during n' part only of the pivot-cl movement of the arms, and remain out of contact during the remainder of said movement.l

3. The combination in a friction device of tno arms, each having a friction-producing flange of varying depth; n third arm having a flange et varying depth on each face and The device can be adjusted so that pivotally interposed between said other arms; and friction disks respectively mounted between the third arm'` and each of the other two arms, the flanges of the third arm being placed to contact with the flanges of the other arms 'during a portion of the movement of the arms. y

4. A frition -device comprising al lurality of arms pivotally joined toget er; friction disks interposed between said arms; with means independent of the disks and actuated by the arms forV exerting friction between thc same during a portion only of their )ossihle movement.

friction device for a door comprising a plurality of arms pivotall joined together; brackets pivotedY to t e arms and adapted to be secured to theldoor and to the supporting structure of the door respectively; frietion disks interposed between said arms; and ineens independent of the disks and actuated by the arms for exerting friction between said arms during a por.

tion only of their possible movement.

6. The combination in a. frietioo'devicev of :i plurality of prms of which certain have notches; :t bolt lpivotnlly connectin the :il-ms; :i sleeve surrounding the bolt an having projections engaging the notches in said arms, the unnotched arm being free to move on said sleeve; and means for securingthe arms together.

7. The combination in n friction device, of n plurality of nrms;fa bolt pivotally connecting the arms; a washer on said bolt; a member slidably keyed to said bolt and having :i portion engagingfsnid washer to prevent it from moving independently thereof; and :i nut on said bolt engaging said member.

8. The combination, in a friction device, of plates :ida Led to be secured respectively to n door an to the jamb thereof each of said lates' having :i fixed arm extending there rom; a third hrm notched for the reception or' :ind slidable on one of said plates; mens for pivotolly connecting the arms; and friction means interposed between said arms. l

- 9. A friction device comprising a lurality of arms pivotnlly joined toget er; friction means interposed between said arms; with means inde ',ndent of said fric- I 

